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Posted to users@httpd.apache.org by allan juul <al...@muly.dk> on 2005/08/26 20:28:27 UTC
[users@httpd] rewritemap environment variables
hello,
does anyone know the limitations specs for environment variables,
specifically when used via mod_rewrite prg ?
i am able to hardcode a variable with a value of more than 2048 bytes
# this will work
RewriteRule ^/(.*) - [E=VAR_1:long_string_more_than_2048]
RequestHeader set REQ_TEST_1 %{VAR_1}e
but a program that return more than 2048 the set variable value will get
truncated at 2048
# REQ_TEST_2 will have 2048 bytes
RewriteRule ^/(.*) [E=VAR_2:${mapprg:some_argument}]
RequestHeader set REQ_TEST_2 %{VAR_2}e
./allan
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Re: [users@httpd] rewritemap environment variables
Posted by André Malo <nd...@perlig.de>.
* allan juul wrote:
> ok thanks, i assume there is a reason for that limitation in the first
> place.
Yes, it's simpler to program ;-) and a little bit faster.
> i have tried to recompile with LONG_STRING_LEN set to 20480
> (which is twice my current need). that worked fine in my case but i'm of
> course not sure i have potentially "broken" anything else (?)
Threading MPMs may get a problem, because this results in bigger stack
needs. The 2.1 solution allocates memory on the heap.
nd
--
Winnetous Erbe: <http://pub.perlig.de/books.html#apache2>
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Re: [users@httpd] rewritemap environment variables
Posted by allan juul <al...@muly.dk>.
André Malo wrote:
> * allan juul wrote:
>
>
>>does anyone know the limitations specs for environment variables,
>>specifically when used via mod_rewrite prg ?
>
>
> Yes. The read buffer for prg: is limited to 2K. This limitation has been
> removed in 2.1/2.2.
>
> nd
ok thanks, i assume there is a reason for that limitation in the first
place. i have tried to recompile with LONG_STRING_LEN set to 20480
(which is twice my current need). that worked fine in my case but i'm of
course not sure i have potentially "broken" anything else (?)
./allan
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Re: [users@httpd] rewritemap environment variables
Posted by André Malo <nd...@perlig.de>.
* allan juul wrote:
> does anyone know the limitations specs for environment variables,
> specifically when used via mod_rewrite prg ?
Yes. The read buffer for prg: is limited to 2K. This limitation has been
removed in 2.1/2.2.
nd
--
"Solides und umfangreiches Buch"
-- aus einer Rezension
<http://pub.perlig.de/books.html#apache2>
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